The summary is that screens supporting Rec. 2020 or Rec. 2100 offers a wider gamut than sRGB (40% wider).
Those deciding on the direction of the future of displays, especially the trend towards "HDR" technology, should look into Rec. 2100.

Accept the T&C (or not, skipping this section and booting into Ubuntu is effectively the same)

Wait for the ~200MB Ubuntu Subsystem Image to Download, Extract and Install

And that's it! A mini non-Linux environment within Windows. Similar to how OS X does it, only 10 years behind.

Takes around 30 minutes.

Those Linux commands

With how administrative/root privileges work in WSL, you don't need "su/sudo" to run what are normally root commands (if you've skipped setting up the root user).apt-get install build-essential should work on its own.
The build-essential package is required to run Swift. Without it, Swift would just fail in executing scripts. Unfortunately, this is quite a large package on Ubuntu, and even on Windows its no exception.
So run the command and wait it out, a tip to speed up the process of downloading packages is shown in the video.
Running apt-get install clang allows for Swift code compilation support in Windows via swiftc (swiftc with build-essentials alone does not work). Interestingly the resulting binary that swiftc compiles is a native Linux/Ubuntu ELF instead of a Windows exe.

Takes around 30 minutes.

Swift

Download Swift from here: https://swift.org/download/, note that you'd want the Ubuntu 14.04 version, if still offered.
Extract the archive just like you would on Ubuntu (or extract it using the Windows method, whichever you prefer), and run /usr/bin/swift through bash.

Takes around 10 minutes.

And that's it! Swift (the programming language) running on Windows 10 using the Windows Subsystem for Linux!

Although REPL doesn't really work, and you're not exactly working with native Windows goodness.